Ring of Djinni Summoning

Legendary (requires attunement)
While wearing this ring, you can speak its command word as an action to summon a particular djinni from the Elemental Plane of Air. The djinni appears in an unoccupied space you choose within 120 feet of you. It remains as long as you concentrate (as if concentrating on a spell), to a maximum of 1 hour, or until it drops to 0 hit points. It then returns to its home plane.
While summoned, the djinni is friendly to you and your companions. It obeys any commands you give it, no matter what language you use. If you fail to command it, the djinni defends itself against attackers but takes no other actions.
After the djinni departs, it can't be summoned again for 24 hours, and the ring becomes nonmagical if the djinni dies.

Ring of Elemental Command

Legendary (requires attunement)
This ring is linked to one of the four Elemental Planes. The DM chooses or randomly determines the linked plane.
While wearing this ring, you have advantage on attack rolls against elementals from the linked plane, and they have disadvantage on attack rolls against you. In addition, you have access to properties based on the linked plane.
The ring has 5 charges. It regains 1d4 + 1 expended charges daily at dawn. Spells cast from the ring have a save DC of 17.

Ring of Air Elemental Command

You can expend 2 of the ring's charges to cast dominate monster on an air elemental. In addition, when you fall, you descend 60 feet per round and take no damage from falling. You can also speak and understand Auran.
If you help slay an air elemental while attuned to the ring, you gain access to the following additional properties:

Ring of Earth Elemental Command

You can expend 2 of the ring's charges to cast dominate monster on an earth elemental. In addition, you can move in difficult terrain that is composed of rubble, rocks, or dirt as if it were normal terrain. You can also speak and understand Terran.
If you help slay an earth elemental while attuned to the ring, you gain access to the following additional properties:

You have resistance to acid damage.

You can move through solid earth or rock as if those areas were difficult terrain. If you end your turn there, you are shunted out to the nearest unoccupied space you last occupied.

You can cast the following spells from the ring, expending the necessary number of charges: stone shape (2 charges), stoneskin (3 charges), or wall of stone (3 charges).

Ring of Fire Elemental Command

You can expend 2 of the ring's charges to cast dominate monster on a fire elemental. In addition, you have resistance to fire damage. You can also speak and understand Ignan.
If you help slay a fire elemental while attuned to the ring, you gain access to the following additional properties:

You are immune to fire damage.

You can cast the following spells from the ring, expending the necessary number of charges: burning hands (1 charge), fireball (2 charges), and wall of fire (3 charges).

Ring of Water Elemental Command

You can expend 2 of the ring's charges to cast dominate monster on a water elemental. In addition, you can stand on and walk across liquid surfaces as if they were solid ground. You can also speak and understand Aquan.
If you help slay a water elemental while attuned to the ring, you gain access to the following additional properties:

You can breathe underwater and have a swimming speed equal to your walking speed.

Ring of Evasion

Rare (requires attunement)
This ring has 3 charges, and it regains 1d3 expended charges daily at dawn. When you fail a Dexterity saving throw while wearing it, you can use your reaction to expend 1 of its charges to succeed on that saving throw instead.

Ring of Feather Falling

Rare (requires attunement)
When you fall while wearing this ring, you descend 60 feet per round and take no damage from falling.

Ring of Free Action

Rare (requires attunement)
While you wear this ring, difficult terrain doesn't cost you extra movement. In addition, magic can neither reduce your speed nor cause you to be paralyzed or restrained.

Ring of Invisibility

Legendary (requires attunement)
While wearing this ring, you can turn invisible as an action. Anything you are wearing or carrying is invisible with you. You remain invisible until the ring is removed, until you attack or cast a spell, or until you use a bonus action to become visible again.

Ring of Jumping

Uncommon (requires attunement)
While wearing this ring, you can cast the jump spell from it as a bonus action at will, but can target only yourself when you do so.

Ring of Mind Shielding

Uncommon (requires attunement)
While wearing this ring, you are immune to magic that allows other creatures to read your thoughts, determine whether you are lying, know your alignment, or know your creature type. Creatures can telepathically communicate with you only if you allow it.
You can use an action to cause the ring to become invisible until you use another action to make it visible, until you remove the ring, or until you die.
If you die while wearing the ring, your soul enters it, unless it already houses a soul. You can remain in the ring or depart for the afterlife. As long as your soul is in the ring, you can telepathically communicate with any creature wearing it. A wearer can't prevent this telepathic communication.

Ring of Protection

Rare (requires attunement)
You gain a +1 bonus to AC and saving throws while wearing this ring.

Ring of Regeneration

Very Rare (requires attunement)
While wearing this ring, you regain 1d6 hit points every 10 minutes, provided that you have at least 1 hit point. If you lose a body part, the ring causes the missing part to regrow and return to full functionality after 1d6 + 1 days if you have at least 1 hit point the whole time.

Ring of Resistance

Rare (requires attunement)
You have resistance to one damage type while wearing this ring. The gem in the ring indicates the type, which the GM chooses or determines randomly.

d10

Damage Type

Gem

1

Acid

Pearl

2

Cold

Tourmaline

3

Fire

Garnet

4

Force

Sapphire

5

Lightning

Citrine

6

Necrotic

Jet

7

Poison

Amethyst

8

Psychic

Jade

9

Radiant

Topaz

10

Thunder

Spinel

Ring of Shooting Stars

Very Rare (requires attunement)
While wearing this ring in dim light or darkness, you can cast dancing lights and light from the ring at will. Casting either spell from the ring requires an action.
The ring has 6 charges for the following other properties. The ring regains 1d6 expended charges daily at dawn.

Faerie Fire: You can expend 1 charge as an action to cast faerie fire from the ring.

Ball Lightning: You can expend 2 charges as an action to create one to four 3-foot-diameter spheres of lightning. The more spheres you create, the less powerful each sphere is individually. Each sphere appears in an unoccupied space you can see within 120 feet of you. The spheres last as long as you concentrate (as if concentrating on a spell), up to 1 minute. Each sphere sheds dim light in a 30-foot radius. As a bonus action, you can move each sphere up to 30 feet, but no farther than 120 feet away from you. When a creature other than you comes within 5 feet of a sphere, the sphere discharges lightning at that creature and disappears. That creature must make a DC 15 Dexterity saving throw. On a failed save, the creature takes lightning damage based on the number of spheres you created.

Spheres

Lightning Damage

4

2d4

3

2d6

2

5d4

1

4d12

Shooting Stars: You can expend 1 to 3 charges as an action. For every charge you expend, you launch a glowing mote of light from the ring at a point you can see within 60 feet of you. Each creature within a 15-foot cube originating from that point is showered in sparks and must make a DC 15 Dexterity saving throw, taking 5d4 fire damage on a failed save, or half as much damage on a successful one.

Ring of Spell Storing

Rare (requires attunement)
This ring stores spells cast into it, holding them until the attuned wearer uses them. The ring can store up to 5 levels worth of spells at a time. When found, it contains 1d6 - 1 levels of stored spells chosen by the GM.
Any creature can cast a spell of 1st through 5th level into the ring by touching the ring as the spell is cast. The spell has no effect, other than to be stored in the ring. If the ring can't hold the spell, the spell is expended without effect. The level of the slot used to cast the spell determines how much space it uses.
While wearing this ring, you can cast any spell stored in it. The spell uses the slot level, spell save DC, spell attack bonus, and spellcasting ability of the original caster, but is otherwise treated as if you cast the spell. The spell cast from the ring is no longer stored in it, freeing up space.

Ring of Spell Turning

Legendary (requires attunement)
While wearing this ring, you have advantage on saving throws against any spell that targets only you (not in an area of effect). In addition, if you roll a 20 for the save and the spell is 7th level or lower, the spell has no effect on you and instead targets the caster, using the slot level, spell save DC, attack bonus, and spellcasting ability of the caster.

Ring of Swimming

Uncommon
You have a swimming speed of 40 feet while wearing this ring.

Ring of Telekinesis

Very Rare (requires attunement)
While wearing this ring, you can cast the telekinesis spell at will, but you can target only objects that aren't being worn or carried.

Ring of the Ram

Rare (requires attunement)
This ring has 3 charges, and it regains 1d3 expended charges daily at dawn. While wearing the ring, you can use an action to expend 1 to 3 of its charges to attack one creature you can see within 60 feet of you. The ring produces a spectral ram's head and makes its attack roll with a +7 bonus. On a hit, for each charge you spend, the target takes 2d10 force damage and is pushed 5 feet away from you.
Alternatively, you can expend 1 to 3 of the ring's charges as an action to try to break an object you can see within 60 feet of you that isn't being worn or carried. The ring makes a Strength check with a +5 bonus for each charge you spend.

Ring of Three Wishes

Legendary
While wearing this ring, you can use an action to expend 1 of its 3 charges to cast the wish spell from it. The ring becomes nonmagical when you use the last charge.

Ring of Warmth

Uncommon (requires attunement)
While wearing this ring, you have resistance to cold damage. In addition, you and everything you wear and carry are unharmed by temperatures as low as -50 degrees Fahrenheit.

Ring of Water Walking

Uncommon
While wearing this ring, you can stand on and move across any liquid surface as if it were solid ground.

Ring of Winter

Artifact (requires attunement)
Artus Cimber has kept this item in his possession for over a century. The Ring of Winter is a golden band that resizes to fit snugly on the finger of its wearer. A thin layer of frost coats the outside of the ring, which normal heat can't melt. The ring feels ice cold to the touch and initially numbs the hand that wears it, but this cold ceases to be felt by one who is attuned to the ring.
The Ring of Winter is sentient and tries to take control of any creature that wears it. If it succeeds, the ring compels its wearer to cause undue harm to everyone and everything around it, in a cold-hearted attempt to incur the wrath of enemies and bring about the wearer's doom.

Sentience: The Ring of Winter is a sentient chaotic evil item with an Intelligence of 14, a Wisdom of 14, and a Charisma of 17. The ring communicates by transmitting emotion to the creature carrying or wielding it, and it has hearing and normal vision out to a range of 60 feet. The ring craves destruction, and it likes inflicting indiscriminate harm on others.

Nondetection: The Ring of Winter defies attempts to magically locate it. Neither the ring nor its wearer can be targeted by any divination magic or perceived through magical scrying sensors.

Frozen Time: As long as you wear the ring, you don't age naturally. This effect is similar to suspended animation, in that your age doesn't catch up to you once the ring is removed. The ring doesn't protect its wearer from magical or supernatural aging effects, such as the Horrifying Visage of a ghost.

Cold Immunity: While attuned to and wearing the ring, you have immunity to cold damage and don't suffer any ill effects from extreme cold.

Magic: The Ring of Winter has 12 charges and regains all its expended charges daily at dawn. While wearing the ring, you can expend the necessary number of charges to activate one of the following properties:

You can expend 1 charge as an action and use the ring to lower the temperature in a 120-foot-radius sphere centered on a point you can see within 300 feet of you. The temperature in that area drops 20 degrees per minute, to a minimum of -30 degrees Fahrenheit. Frost and ice begin to form on surfaces once the temperature drops below 32 degrees. This effect is permanent unless you use the ring to end it as an action, at which point the temperature in the area returns to normal at a rate of 10 degrees per minute.

You can cast one of the following spells from the ring (spell save DC 17) by expending the necessary number of charges: Bigby's hand (2 charges; the hand is made of ice, is immune to cold damage, and deals bludgeoning damage instead of force damage as a clenched fist), cone of cold (2 charges), flesh to ice (3 charges; as flesh to stone except that the target turns to solid ice with the density and durability of stone), ice storm (2 charges), Otiluke's freezing sphere (3 charges), sleet storm (1 charge), spike growth (1 charge; the spikes are made of ice), or wall of ice (2 charges).

You can expend the necessary number of charges as an action and use the ring to create either an inanimate ice object (2 charges) or an animated ice creature (4 charges). The ice object can't have any moving parts, must be able to fit inside a 10-foot cube, and has the density and durability of metal or stone (your choice). The ice creature must be modeled after a beast with a challenge rating of 2 or less. The ice creature has the same statistics as the beast it models, with the following changes: the creature is a construct with vulnerability to fire damage, immunity to cold and poison damage, and immunity to the following conditions: charmed, exhaustion, frightened, paralyzed, petrified, and poisoned. The ice creature obeys only its creator's commands. The ice object or creature appears in an unoccupied space within 60 feet of you. It melts into a pool of normal water after 24 hours or when it drops to 0 hit points. In extreme heat, it loses 5 (1d10) hit points per minute as it melts.

Other Properties: The Ring of Winter is rumored to possess other properties that can be activated only by an evil being whose will the ring can't break. Frost giants have long believed that the ring can be used to freeze entire worlds, while a djinni in the service of a Calishite pasha once claimed that the ring could be used to summon and control white dragons, as well as a mighty ice primordial named Cryonax.

Destroying the Ring: The ring is nigh indestructible, resisting even the most intense magical heat. If it is placed on the finger of the powerful arch fey known as the Summer Queen, the ring melts away and is destroyed forever.

Ring of X-Ray Vision

Rare (requires attunement)
While wearing this ring, you can use an action to speak its command word. When you do so, you can see into and through solid matter for 1 minute. This vision has a radius of 30 feet. To you, solid objects within that radius appear transparent and don't prevent light from passing through them. The vision can penetrate 1 foot of stone, 1 inch of common metal, or up to 3 feet of wood or dirt. Thicker substances block the vision, as does a thin sheet of lead.
Whenever you use the ring again before taking a long rest, you must succeed on a DC 15 Constitution saving throw or gain one level of exhaustion.